Paving construction



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f encuen B. SHFFER AND WILLM W. n, OF PHOENIX, An'izona.

ravine CONSTRUCTION application mea December 5. 1925. seaijita-'zasaa .l This invention relates to paving construe# l pare 1 showing Ithereto; l Fig.- 2-'is a perspectl manner in whlch our skirtis applied .to the.

joint. 1 5

provide a skirt in -connection with pretion.

The general'object' of the invention is to provide a'nimproved joint for use in con crete work.'4 I rOne of the vspecific objects of the invention is to'pro'videfmeans for preventing concrete from getting1 under expansion joints. which are arrange at the ends of the sectlons of concrete.

Another object. of the .invention is to provide a s'kirted expansion joint which will prevent concretefrom getting under the furthe-r object ofrthqe invention is toformed expansion joints wherein the skirt is folded overl the jointv and lapped over the 'sides thereof onto theJ base to prevent concrete fromgetti'ngbeneath `the joint. -Otlrier objects ofthe invention will be apnt'from the following descriptionvl taken in connection with the accompanying drawin'swherein:l v

ig. 1 is a sectionalview through a joint the :applicationA of our invention 've Vview 4showing the joint;l l,

` Fig. 3 vs a` fragmentary plan viewl partly broken. away showing the joint; Fig. 4 is a view similar to Fig. 1 on an en larg-ed .s`cale; .I

Fig. 5 is a'view -similar to Fig.; 1 showing a modification ofthe invention;

Fig. 6 is a perspective view of. the modification shown in` Fig. 5; 'and Figs. 7 8 and 9- are erosssectional views showing a further modication. AReferring tothe drawing by reference characters we have shown our invention gen1 erally at 10. The invention is here shown as embodied in a concrete road construction` although it will be'understoo'd that Ithe invention is not limited to such use.

Referrin again to the drawing we sh`ow a base or oundation at 11.'` An expansion joint is shown'at 12. rIhis expansign .joint may be of any suitable character andmay be one' which is manufactured .ready for insertion or as will be. later described, thejoint may be one which is arranged in position afterthe roadway or other structure is come pleted; H

In using our invention the expansion joint 12 is liirstarran'ged in its proper..p0sition" after which a skirt 14 embodyin lthe features of. our invention is drape over the' joint 12. This skirt may be made offa'bric,

' flexible paper, or metalor of any other maf terial and mayv befashoned in any desired manner, The skirt as shown in Figs. 1'to 4 /in'cluslve is of s'uicient length sothat it will fit jover the jointto provide a top 15 and s1des 16 with va portion 17 ofl sufficient lengths .that it will vextendsoine. distance along the foundation or --basel 11. The skirt-14 maybe merely laid over v.the

' expansion joint or it may becemented -or otherwise` secured thereto and may be shipped from the factory with the joint as a y unit if desired. After the joints` have 'been positioned with the part 17 of the skirt 11, the concrete-is poured in the usual manner so that the concrete as shown at 18 will iit over the parts '17 of the skirt and thereby hold the joint in proper position. AThe oncrete' is then worked to the proper sure 3GB. l f a With our invention the of concrete working beneath the' joint 12.

re is ad likeiihetd sol 'ln road workand in other places where expansion joints have been used it has been a great source of annoyance andv expense that green concrete would work beneath the joint .and thus impair theeciency of the' joint. With our invention the concrete engages thev part' 17 and. the part 16- sothat it does not get beneath the joint thus allowing thefull efficiency of the joint to be utilized f and also assuring that the. joint will` be properly positioned. e v 1 instead: of employing a skirt which f is folded over a precast blocks Iwe may provide al precast block 20y as shown in Figs. 5 and 6 witha member 21` here shown as a metal .member secured to the vbottom ofthe precast 'joint'bymeans of fastening members shown at 22. The use of this skirt.V and joint is the same as that vpreviously described. The

fastening members 22'hold the skirt 21 in tight engagement with the lower face of the joint 20 and prevent the concrete from l working thereunder.. ln Figs. i', 8 and-9 we show our invention as 'applied to joints wherein the expansion joint lis arranged in placeafter the conj .crete has been poured. AIn this case the con;- crete 23 is poured againstl form members 24 shown as spaced by blocks 25, although any other means may be usedv which will ciency concrete 23.

otherwise inserted in place.

provide anopening between the ends of Ithe After the members 24 and .24: are removed an opening 25 is providedl as shown in Fig. 8. i

Before the concrete is applied and before the members 24 are placed we arrange a skirt 23, upon the foundation or base 11.

This skirt 23 is engaged by the lower por;

tion of the forms24 and in `order toprevent 'tearing of the memberI 23 a surpl-us of material is provided as at 26. This surplus is flattened down as shown at 26v in F1 9, or`

.when the expansion joint 27 is poure In thls case' as well as 1n the other cases previously described, the skirt prevents the concrete from` working under the joint so that the full effi-A of the joint is secured and this joint is held in proper position. f

From the foregoing description it will be appar-ent that' we have provided van improved paving construction wherein a skirt is used for preventing concrete from .'getting beneath the expansion joint.

Our invention isy extremely simple and the cost thereof is slight. Wlith our construction avery superior product is obtained and one in which the full eificiency of the eX- pansion joint may be utilized. j

Having 'thus described our invention, we claim: j

l. In an' expansion joint for ooncretecemprising a sti expansionmember, a foundation, a flexible skirtv projecting from the` lower portion of the expansion member, said skirt engaging the foundation and concrete arranged upon the foundation and engaging a portion of the skirt which is on the foun-A dation.

2. An expansion joint vfor concrete com' `prismg a stnf expanslon member, a foundation, a skirttted over the top of the eX- pansion me ber and extending along the sid-es thereof and havingits ends arranged upon the foundation, and concrete engaging the part of the slIirt which is against the foundation and against the expansion member. In the art of usngCOnCrete, the method of making "an expansion joint-which comprises taking a precast expansion' member, arranging a flexible skirt over the top4 and side of the expansion member, placing Athe jointl on afoundation, arranging the ends of the skirt on thefoundation and at 

